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[0/3] spi: stm32_qspi: use QSPI bus as 8 lines communication channel

Message ID 20220808074051.44736-1-patrice.chotard@foss.st.com
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Series spi: stm32_qspi: use QSPI bus as 8 lines communication channel | expand

Message

Patrice CHOTARD Aug. 8, 2022, 7:40 a.m. UTC 
From: Patrice Chotard <patrice.chotard@foss.st.com>


The goal of this series is to allow to use QSPI bus as a 8 lines communication 
channel for specific purpose.

The QSPI block offers the possibility to communicate with 2 flashes in 
parrallel using the dual flash mode, 8 data lines are then used.
A new ST specific property need to be created to enable this dual flash mode.

The addition of the legacy transfer_one_message() spi callback is also needed
as currently the stm32-qspi driver only supports spi_controller_mem_ops API.


Patrice Chotard (3):
  dt-bindings: spi: stm32: Add st,dual-flash property in
    st,stm32-qspi.yaml
  spi: stm32_qspi: Add transfer_one_message() spi callback
  ARM: dts: stm32: Create separate pinmux for qspi cs pin in
    stm32mp15-pinctrl.dtsi

 .../bindings/spi/st,stm32-qspi.yaml           |   8 ++
 arch/arm/boot/dts/stm32mp15-pinctrl.dtsi      |  50 +++++---
 arch/arm/boot/dts/stm32mp157c-ev1.dts         |  12 +-
 drivers/spi/spi-stm32-qspi.c                  | 111 ++++++++++++++++--
 4 files changed, 155 insertions(+), 26 deletions(-)